An Improved Nondestructive Semantic Segmentation Method for Concrete Dam Surface Crack Images with High Resolution

Table 3

F index of different CNN backbones on validation set.

Model name	CNN backbone	Bath size	Max F	Total epoch	Relative/absolute training time
I	ResNetv2-50	50	0.87	60	1.00x/49 h
II	ResNetv2-50s	50	0.88 + 1.1%	60	0.43x/21 h
III	ResNetv2-50s	50	0.86 – 1.1%	60	0.29x/14 h